/**
 * 点击search操作,实现Ctrl+F操作效果
 */
var DOM = (document.getElementById) ? 1 : 0;
var NS4 = (document.layers) ? 1 : 0;
var IE4 = 0;
if (document.all) {
	IE4 = 1;
	DOM = 0;
}
var win = window;
var n = 0;
function findInPage(str) {
	var txt, i, found;
	if (str == "")
		return false;
	if (DOM) {
		win.find(str, false, true);
		return true;
	}
	if (NS4) {

		if (!win.find(str))
			while (win.find(str, false, true))
				n++;
		else
			n++;
		if (n == 0)
			alert("未找到指定内容.");
	}
	if (IE4) {
		txt = win.document.body.createTextRange();
		for (i = 0; i <= n && (found = txt.findText(str)) != false; i++) {
			txt.moveStart("character", 1);
			txt.moveEnd("textedit");
		}
		if (found) {
			txt.moveStart("character", -1);
			txt.findText(str);
			txt.select();
			txt.scrollIntoView();
			n++;
		} else {
			if (n > 0) {
				n = 0;
				findInPage(str);
			} else
				alert("未找到指定内容.");
		}
	}
	return false;
}